condition mean min max ZT0-3 0.8897816666666667 0.3085125 1.385475 ZT4-7 0.0 0.0 0.0 ZT8-11 0.95221 0.95221 0.95221 ZT12-15 0.52482625 0.3453275 0.704325 ZT16-19 0.307736 0.307736 0.307736 ZT20-23 0.681643 0.681643 0.681643